please explain how you got the blanks as well

Two or more items are omitted in each of the tabulations of income statement data shown below. Fill in the amounts that are missing. 2021 2022 2023 Sales revenue 291,520 360957 409.620 Sales returns and allowances 10,540 12,950 22553 Net sales 280980 348,007 38 Beginning inventory 21.030 31,530 Ending inventory 31530 i Purchases 258,690 300,270 Purchase returns and allowances 5,050 7,200 9,720 Freight-in 8,210 9,270 11,390 Cost of goods sold 230,400 262497 290,077 Gross profit on sales 50,580 85,510 96,990